Abstract
A theoretical fracture mechanics for brittle piezoelectric and dielectric materials is developed consistent with standard features of elasticity and dielectricity. The influence of electric field and mechanical loading is considered in this approach and a Griffith style energy balance is used to establish the relevant energy release rates. Results are given for a finite crack in an infinite isotropic dielectric and for steady state cracking in a piezoelectric strip. In the latter problem, the effect of charge separation in the material and discharge in the crack are considered. Observations of crack behavior in piezoelectrics under combined mechanical and electrical load are discussed to assess which features of the theory are useful.
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McMeeking, R.M. Towards a fracture mechanics for brittle piezoelectric and dielectric materials. International Journal of Fracture 108, 25–41 (2001). https://doi.org/10.1023/A:1007652001977
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DOI: https://doi.org/10.1023/A:1007652001977